comparasion of cast materials

Click here to see comparison of direct filling materials

Click here to see how crowns are done

Click here to see how bridges are done

Click here to see a page on dental composites

Click here to see a page on castable dental alloys--their compositions and why they are made that way


Indirect restorations are generally done in two or more dental visits. The first visit involves cutting the tooth down to a size and shape in which it will be able to support and retain a custom manufactured restoration. An impression, which records the shape of the preparation, down to the most minute detail is taken and sent to the laboratory where the restoration is fabricated. The patient leaves the office with a temporary restoration generally made of plastic and is given an appointment for an insert date several weeks later after the lab has finished making the restoration. The final restoration is inserted using a cement to adhere it to the tooth preparation on the second visit. (Note: In some practices, these restorations are fabricated in-office using a computer assisted design technique, in which case the patient may receive the finished restoration at the same visit.)

Comparison of Indirect Restorative Dental Materials

Factors All-Porcelain (ceramic) Porcelain Fused To Metal Gold Alloys (high nobel) Base Metal Alloys (non-nobel)
General Description
Porcelain, ceramic or glasslike fillings and crowns Porcelain is fused to an underlying metal structure to provide strength to a filling, crown or bridge. Alloy of gold, copper and other metals resulting in a strong, effective filling, crown or bridge. Alloys of non-noble metals with silver appearance resulting in high strength crowns and bridges.
Principal Uses Inlays, onlays, crowns and aesthetic veneers Crowns and fixed bridges. Inlays, onlays, crowns and fixed bridges Crowns, fixed bridges and partial dentures.
Leakage and Recurrent Decay
Sealing ability depends on materials, underlying tooth structure and procedure used for placement. The commonly used methods used for placement provide a good seal against leakage. The incidence of recurrent decayy is similar to other restorative procedures.
Durability Brittle material, may fracture under heavy biting loads. Strength depends greatly on quality of bond to underlying tooth structure. Very strong and durable. High corrosion resistance prevents tarnishing; high strength and toughness resist fracture and wear.
Cavity Preparation Considerations


Because strength depends on adequate porcelain thickness, it requires more aggressive tooth reduction during preparation. Including both porcelain and metal creates a stronger restoration than porcelain alone; moderately aggressive tooth reduction is required. The relative high strength of metals in thin sections requires the least amount of healthy tooth structure removal.
Clinical Considerations


These are multiple step procedures requiring highly accurate clinical and laboratory processing. Most restorations require multiple appointments and laboratory fabrication.
Resistance to Wear Highly resistant to wear, but porcelain can rapidly wear opposing teeth if its surface becomes rough. Highly resistant to wear, but porcelain can rapidly wear opposing teeth if its surface becomes rough. Resistant to wear and gentle to opposing teeth.
Resistance to Fracture Prone to fracture when placed under tension or on impact. Porcelain is prone to impact Highly resistant to fracture. fracture; the metal has high strength. Highly resistant to fracture.
Biocompatibility Well tolerated. Well tolerated, but some patients may show allergenic sensitivity to base metals. Well tolerated. Well tolerated, but some patients may show allergenic sensitivity to base metals.
Post-Placement Sensitivity Sensitivity, if present, is usually not material specific.
Low thermal conductivity reduces the likelihood of discomfort from hot and cold. High thermal conductivity may result in early post-placement discomfort from hot and cold.
Esthetics Color and translucency mimic natural tooth appearance. Porcelain can mimic natural tooth appearance, but metal limits translucency. Metal colors do not mimic natural teeth.
Relative Cost to patient Higher; requires at least two Patient office visits and laboratory services.
Average Number of Visits to Complete Minimum of two; matching esthetics of teeth may require more visits. Minimum of two; matching esthetics of teeth may require more visits. Minimum of two.














Click the button above to email Doctor Spiller.


Your browser must be Java enabled to use the email button.
If the email button does not work on your browser, click here.

I do not answer LONG emails. If you don't receive a reply, then your letter was too long. Make your questions short and precise. I don't have time to answer rambling, multiple questionnaires.
I cannot diagnose something I cannot see. Don't ask about sores in your mouth. See a dentist.

Please do not inquire about fees. See this page instead.).

I DO appreciate your help in correcting typos and broken links.






No dental insurance?
What is dental
insurance and how
does it work?

Are your fillings
killing you?
Is mercury ruining your
life??

Is Fluoride poison?
Should it be illegal?

Do Root Canals cause
multiple sclerosis or
other diseases?
Click here to find out.

Are dentures better
than real teeth?
Should you have all your
teeth pulled and get
false teeth?

Bad breath?
What is causing your bad
breath, and how can you
treat it?

Cure your dry mouth for
Free
Click here to find out how.





Copyright 2000 by Doctor Martin S. Spiller, DMD
Please click here to see the terms of fair use.





Check out another family website!
San Francisco Desktop Guy.
Free BIG desktop images for multiple monitors.